Valve mechanism



Aug. 30, 193 R. SHOWMIN VALVE IVIEGI'IA NI SM Filed May 14, 1930 3 Sheets-Sheet Aug. 30, 1932. R. SHOWMIN VALVE MECHANISM Filed May 14-, 1930 5 Sheets-Sheet 2 H l I ll minim Patented Aug. 30, 1932 "UNITED sTA'T Es A licantsmed my 14,

This invention relates to a valve mechanism for internal combustion engines and 1s an improvement of the construction dlsclosed in my Patent Number 1,798,040, March 24, 1931.

It is a prime object of the present invention to provide a more efficient means for maintaining the rotary valve in contact with its seat and particularly maintain it in inti mate contact with the seat adjacent the intake proper longitudinal adjustment and in place in the cylinder head.

Various additional objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings Figure 1 is a central longitudinal vertical sectional view through the principal part of an internal combustion engine embodying my improvements, 7

Figure 2 is a cross sectional view taken on the line 22 of Figure 1,

Figure 3 is a plan View of the engine,

Figure 4: is a view in horizontal section through the engine at the axis of the valve,

Figure 5 is a cross sectional view. taken through the engine on the line 55 of Figure 1, Q

Figure 6 is a cross section of the view taken through the engine on the line 66 of Figure 1, and

Figure 7 is a horizontal sectional view taken on the line 77 of Figure 1.

Referring specifically to the drawings 10 designates the cylinder block of my improved 193p. Serial No. 452,4335.

ROSS snowmrir, on nossronn, orrIo engine, the same being adapted for communi cation in the usual way' with the crank case and lower portion. Suchblock embodies" the usual cylinders 11 in whichpistons move and are driven in propers'equen-ce. y.

..Surmounting. the*'block 10. is the engine head 13, a gasketM'being interposed between the block and head. A. closureplate 15 surmounts'the head, a gasket 16 being interposed betweenthe same and head. Bolts 17 passth-rough the plate 15, head13, and cylindenblock 10, being threaded to the latter,

removably and adjustably securing the parts together. The engine is ofthe water cooled type and the head 133ml cylinder block have communicating passages for thewater as at 18: and 19, respectively, thejportsof communication between them being designated 20 and 21, respectively.

. psLon gitudin'ally disposed and substantial- "1y centrally of the'head is an annular wall 22 serving as a bearing for a rotary valve structurew23. This valve 23 is held against displacement from the head by means vof rings or collars 24,fone ateach end thereof,

collars or rings 24 are located andhave bearings in yokes 26 which are adjustably secured held in place thereon by set screws 'which bind against the valve to permit adjustm'ent to take up wear or longitudinalplay. Such against opposite endsl'ofthe head '13, by

means of bolts 27 passing through enlarged s1ots=28 of theyokes. 1 g p '1' Integral with one end of the head is an open U-s'haped bearing 29 'for'a waterf su'pply pipe The valve has an, extension 31 sur- 'roundedbyi such and within the same is an abutment ring 32, l fixed thereto in any suit able manner. 1 vPacking 33 to provide a water-tightjo int is 'disposed'against the ring 32 and a; follower 34 engages the packing. The supply pipe is fixed and hasa flange 35 at its inner end. Such flange 35 bears against the follower 34 and it is clamped in that position and the parts in water-tight'relation a cap 36 threaded tothe valve 31"and having an inturned" flange 37 L overlapping the flange 35. This construction conne'ctsithe" valve for rotation with thepipe'30 inwaterji t l V ranged inprope'r a'xial'rela'tion with respect to firing chambers 47 provided in the head i tight relation thereto. Fixed on the valve extension 31 within the bearing frame 29, is a gear wheel 38 which may be driven by any suitable train of gearing or means from the crank shaft of the engine.

At the other end of the valve,it is swivelly connected with a-pipe or conduit 39 which discharges the water into the jacket space 19 of the cylinder block. Such pipe39 adjacent the valve has a flange 40 which is overlapped by a flange of a screw cap=41threaded-' on the valve. The flange 40. abuts afollowor 42 located within the valve, which "com presses packing 43 against-a fixed; ring-.44; The outlet for the water within the valve. p to return to the radiator, is shown at 45 and preferably connected to the plate15; I

x The Valve is generally of the construction disclosedin the pending application afore.

said, having arcuate valve portions 46 ar- 13 and with intake passages 48 and outlet or exhaust paissages 49. Spark plugs 50 are carried by the head so as to fire theexplosive charge within the chambers 47. The charges are fired in proper sequence as disclosed in the. aforesaid application.

Oil passages are provided in'the head'il at 51 and lead to the valve" seat. .Screw threaded into the head and communicating head to adjust said blocks to position the valve. i an engine of the class descrlbed, a rotary valve, blocks in contact therewith,

screws operable from the exterior of the head to adjust said blocks to position the valve, said screws being located off-center withlrespect to 'the valve, and yoke means in which the Valve has bearing to said blocks. Intestimony whereof- I affix my signature.

- -ROSS SHOWMIN.

adjustable with respect with each passage 51 is an oil fitting 52 ar- I ranged through pipe 58 with the oil pump or pressure line of the lubricating system for the engine. 'Thejlubric'ant passing through the passages 51 effectively lubricates the valve and applied in such'quantity that'it leaves the seat through communicating passages 54 and 55, provided in the head13 and block 10 so asto be discharged onto the main or connecting rod bearing 56 located inthe "j crank shaft case of the engine. "In order 1 that such lubricant may be discharged" divrectl'yjonto such bearing, pipes 57 are screw threaded to the cylinderblock 10 as shown.

.At five different and equally spaced .loca- Y tions, adjustingfbloc'ks 58 bear. against the I valve 23. These blocks are engaged. by screws 59 threaded into the plate 15 and said head 13. The screws 59' are individually operable vin order to move the blocks 58 against the valve to'adjust it relatively to its seat or take upwear. "Suchscrews 59 are operable exteriorly of the engine, which is a decided advantage over the constructio'nwof my previously mentioned. application 'and. 1

the head of each screw is provided with an opening .60 through which a rod, crank or other element may bepassed to give leverage for turning the screw. Lock nuts 61 are threaded on the screws and adaptedv for I tightening. against the plate'. l5. The adustment by means of thescrews 59v and blocks 5.8.coact with the. adjustment of the I position of yokes 26 in properly positioning 

